Effect of nano-C doping on the critical current density and flux pinning of MgB2 tapes

Xianping Zhang; Ma Yanwei; Zhaoshun Gao; Dongliang Wang; Z. Yu; Satoshi Awaji; Gen Nishijima; Kazuo Watanabe

doi:10.1109/TASC.2007.899476

Effect of nano-C doping on the critical current density and flux pinning of MgB₂ tapes

Xianping Zhang, Ma Yanwei, Zhaoshun Gao, Dongliang Wang, Z. Yu, Satoshi Awaji, Gen Nishijima, Kazuo Watanabe

IMR - High Field Laboratory for Superconducting Materials

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Nano-C doped Fe-sheathed MgB₂ tapes with different doping levels were fabricated using a powder-in-tube method and an in situ reaction. The effects of nano-C doping on the transition critical temperature, microstructure, critical current density, and flux pinning of MgB₂ tapes were studied. Compared to the undoped tapes, critical current density J_c for all the C-doped samples with different doping level was enhanced by more than an order of magnitude in magnetic fields above 10 T. This result indicates that flux pinning was effectively enhanced by the nano-C doping. Highly dispersed nanoparticles and the substitutions of B by C are proposed to be responsible for the improvement of J_c -B properties.

Original language	English
Pages (from-to)	2915-2918
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.899476
Publication status	Published - 2007 Jun

Keywords

Critical current property
Flux pinning
MgB
Nano-C doping

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10.1109/TASC.2007.899476

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title = "Effect of nano-C doping on the critical current density and flux pinning of MgB2 tapes",

abstract = "Nano-C doped Fe-sheathed MgB2 tapes with different doping levels were fabricated using a powder-in-tube method and an in situ reaction. The effects of nano-C doping on the transition critical temperature, microstructure, critical current density, and flux pinning of MgB2 tapes were studied. Compared to the undoped tapes, critical current density Jc for all the C-doped samples with different doping level was enhanced by more than an order of magnitude in magnetic fields above 10 T. This result indicates that flux pinning was effectively enhanced by the nano-C doping. Highly dispersed nanoparticles and the substitutions of B by C are proposed to be responsible for the improvement of Jc -B properties.",

keywords = "Critical current property, Flux pinning, MgB, Nano-C doping",

author = "Xianping Zhang and Ma Yanwei and Zhaoshun Gao and Dongliang Wang and Z. Yu and Satoshi Awaji and Gen Nishijima and Kazuo Watanabe",

note = "Funding Information: Manuscript received August 25, 2006. This work was supported in part by the National Nature Science Foundation of China (Grant Nos. 50472063), the National “973” Program (Grant No. 2006CB601004) and National “863” Project (Grant No. 2006AA03Z203).",

year = "2007",

month = jun,

doi = "10.1109/TASC.2007.899476",

language = "English",

volume = "17",

pages = "2915--2918",

journal = "IEEE Transactions on Applied Superconductivity",

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T1 - Effect of nano-C doping on the critical current density and flux pinning of MgB2 tapes

AU - Zhang, Xianping

AU - Yanwei, Ma

AU - Gao, Zhaoshun

AU - Wang, Dongliang

AU - Yu, Z.

AU - Awaji, Satoshi

AU - Nishijima, Gen

AU - Watanabe, Kazuo

N1 - Funding Information: Manuscript received August 25, 2006. This work was supported in part by the National Nature Science Foundation of China (Grant Nos. 50472063), the National “973” Program (Grant No. 2006CB601004) and National “863” Project (Grant No. 2006AA03Z203).

PY - 2007/6

Y1 - 2007/6

N2 - Nano-C doped Fe-sheathed MgB2 tapes with different doping levels were fabricated using a powder-in-tube method and an in situ reaction. The effects of nano-C doping on the transition critical temperature, microstructure, critical current density, and flux pinning of MgB2 tapes were studied. Compared to the undoped tapes, critical current density Jc for all the C-doped samples with different doping level was enhanced by more than an order of magnitude in magnetic fields above 10 T. This result indicates that flux pinning was effectively enhanced by the nano-C doping. Highly dispersed nanoparticles and the substitutions of B by C are proposed to be responsible for the improvement of Jc -B properties.

AB - Nano-C doped Fe-sheathed MgB2 tapes with different doping levels were fabricated using a powder-in-tube method and an in situ reaction. The effects of nano-C doping on the transition critical temperature, microstructure, critical current density, and flux pinning of MgB2 tapes were studied. Compared to the undoped tapes, critical current density Jc for all the C-doped samples with different doping level was enhanced by more than an order of magnitude in magnetic fields above 10 T. This result indicates that flux pinning was effectively enhanced by the nano-C doping. Highly dispersed nanoparticles and the substitutions of B by C are proposed to be responsible for the improvement of Jc -B properties.

KW - Critical current property

KW - Flux pinning

KW - MgB

KW - Nano-C doping

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JF - IEEE Transactions on Applied Superconductivity

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Effect of nano-C doping on the critical current density and flux pinning of MgB₂ tapes

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